Three-phase shell-type transformer



Dec. 14, 1926.

- H. L. COLE THREE-PHASE SHELL TYPE- TRANSFORMER Filed August 6, 1923 INVENTOR Aomcel. (b/e wsxz -14. 3.

ATTORNEY latente i 1926'?!- UNITE- i T E- 1,510,492] PATENT o FicE.

HORACE L. COLE, or WILKINSBURG, PENNSYLVANIA, AssIe on TO wEs'rINeHoUsn nnncrnxc a MANUFACTURI G eoivngnNy, AVCORPQRATION or PENNSYLVANIA.

i'nREE-rnAs'E' sHEnL-rYrE' TRANSFORMER.

My invention relates to-electrical transformers of the shell type and more particularly to the core structurespthereof. One object of my invention is to pro- 5 vide a core structure for an electrical trans former in which the quantity 'ofmetal in the core structure is materially reduced.

, Another object of invention is..to pro- A still further object 01651113; invention isto provide a transformerin which a small numberof similar parts is provided, whereby the. structure is provided with adequate ventilating facilities.

-In the accompanying drawings,

Figure l is a view, partiallyin elevation and partially in section, of a 'polyphase transformer embodying my invention;

1 Fig. 2 is a view,part1ally in plan and partially in section, of .a polypliase transformer mbodying my inventlon.

Fig. 3 is a diagrammatic arrangement of "core members and coils embodying my in improyed core for 'polyphase transformers ,whiclr comprises a small number of simllar vention. v

In the several figures of the drawing, similar reference numerals indicate like 7 parts. In the preferred form of my invention, I provide a polyphase transformer witlr a core member comprising a plurality of pairs of sections 1 and 2. The sections 1., are placed in alinement and in juxtaposition in the transformer casing, while the sections 2 are placed at the opposite ends of the alined sections 1.

As shown in Fig. 3, the sections 1 are of substantially hollow rectangular shape and are divided by partitions 3 into longitudinally extending slots 4; The members '2 are of substantially rectangular shape, one of their dimensions being the same as one of the partitions 3, while the other dimension is substantially one half that of the corre sponding dimension of the section 3, thereby defining single slots'5. The sections 1 and 2 maybe-formed ofany' suitable magformed solid, as desired.

men; with said multi-slotted sections.

Applieatibn flle'd August a, lfl2 3m serial No. 655,838.

Iietic materialand they be built up from suitable punchings'. or they may be Suitable windings 6 and 7 ar'e mountedupon tlie sections 1 and '2 in suchjmanner' thatthe adjacent edges of two of the sec-- "Iionscorhprise the core member for the primaryand second'ary windings for each phase of the-polyphase circuit.- 'By so placing "the sections 1 and ,2 relative to one another that small spaces 8'are left between. them, ade

quate ventilation ofeach coil is assured; By reason of the shape-of sections 1 and 2, I am enabled to achieve a substantial re duction in the amount of metal heretofore necessary in the c'oii'struction'of such core members. It is to be observed that 'each core member for the individual windings 6 and 7 comprisesa'side wall of at least-two of the section's. By reason of placing two .of these sections in mechanical juxtaposition, in order to furnish the necessary amount of metal for the core for each separate phase,'I am enabled to materially reduce the amount of metal in either section. Furthermore, by means of my improved arrangement, the central partitions 3, together with the extreme walls of the sections 2, comprise the portions of my transforlmer core which are not surrounded by cm s.

It will be seed that Ihave provided an and modifications may be made in the assemblyand arrangement of the several fea tures of my invention without departing from the spirit and scope thereof, as set forth in the appended claims.

I claim as my invention:

i. In a transformer, a core member comprising a series of multi-slotted sections, and a pair of single slotted 'ehd sections. I 2-. In a transformer, a core member com prising a series of multi-slotted sections, and a pair of single slotted end sections, said single slotted sections being placed in aline- 3. In a transformer, a core member com- I prising a plurality of similar multi-slotted sections in end to end relation, and a pair of single slotted .end sections disposed exteriorly of the first named sections, the slots in the several sections being in parallel relation.

, 4. In a transformer, a plurality of coils, and a core member comprising a plurality of similar 1nulti-slottod sections in juxtaposition, and a pair of single slotted sections disposed exteriorly of the first named elements, said coils being disposed in the adjacent slots of adjoining core sections.

v 5. In a core structure, a plurality of end to end sections of substantially rectangular shape, each of said sections being divided into a pair of longitudinally extending slots, and a pair of end sections having one of the dimensions of the first mentionedsections and substantially one-half of another dimension of the first mentioned sections,

each of said last named sections being provided with a single slot.

6. In a core structure, a plurality of sections of substantially rectangular shape and 1 extending in the same plane, each of said sections being divided into a pair of longitudinally extending slots, and a pair of end sections having one of the dimensions of the first mentioned sections and substantially one-half of another dimension of the first mentioned sections, each of said last named sections being provided With a single slot, said sections being placed with their slots in parallel relation.

7. Ina core structure, a plurality of end to end sections of substantially rectangular shape, each. of said sections being divided into, a pair of longitudinally extending slots, and a pair of end sections having one of the dimensions of the first mentioned sections and substantially one-half of another dimension of the first mentioned sections, each of said last named sections being provided with a single slot, said sections eing disposed with their slots in parallel relation, and with ventilating spaces therebetween.

In testimony whereof, I have hereunto subscribed my name this 2nd day of August HORACE L. COLE. 

